Microsoft gave notice this week that it's planning to update its Office 365 certificates later this month, and the update could affect some hybrid Exchange deployments.

At around 11 a.m., Microsoft provided an update, saying the fix had reached about 90% of affected environments, and its targeted restarts were continuing. Why is Microsoft 365, Outlook, Teams down?

After doing a packet capture when the user selects 'Yes' to the option to add a mailbox and then uses the default options for autodiscover we're seeing Outlook makes a connection to Office 365 ...

Microsoft gave notice this week that it's planning to update its Office 365 certificates later this month, and the update could affect some hybrid Exchange deployments.